and the older brother, tamerlan tsarnaev shot dead. his brother dzhokhar escaped on foot even as police shut down neighborhoods. just about an hour ago all hell broke loose again as a neighbor in watertown called police and said "i see blood on the shed in my backyard." police responded. you may have seen it live on shepard smith. cars from everywhere converged on the site. there is a boat in the backyard with canvas covering the boat. and that is where the suspect now lies, wounded, according to the authorities. once again, it's a very difficult situation because of all of the explosive components here. don't know what he has. you go in, boom! , everybody goes up. this is a mark of a terrorist. this is what these people do. so, let's go to watertown. let's take you back there where fox news correspondent mike tobin is standing by as well as fox news producer chris laible. anything you can add to what i just said. >> explosion may be a strong word i describe them as pops. what they remind me of is the israeli bomb disposal robot that w